Sick meal:
With any meal you make using Llama, no matter what the effect, any Sim that eats it will vomit.

Unlocking clothes:
Get your Sim's relationships to 100 with everyone. Every time you raise another relationship to 100, you will unlock a new article of clothing.

Avoid being fired:
If you accidentally miss your ride to work on your second day of missing work, before it says you have been fired, quickly find another job by looking in the newspaper or the Internet. Once you have avoided the call to get fired, you can change back to your previous job without being demoted and getting deducted skill points.

Development team picture:
Press Right, Down, Right, Down, Right at the title screen.

Easy money:
When you need some money and own a "Defective Arcade Genie Lamp" you can keep making wishes and you will get money eventually. However, the genie can also cause fire and make all the characters in the area of the lamp to pee themselves if you make him mad. When he is mad he will come out of his lamp with red colored smoke beneath him. However, if he is giving you something good the smoke will be purple or pinkish. It is best to perform this when you first get a house so that you can get your money and not risk losing any items you have purchased. Note: If you talk with the genie, he gives you small advice and hints occasionally.

All objects unlocked:
Enable the Cheat Gnome code, then press Z, X, Down, Left, Up during game play.